How many catalytic converters does the stock WRX come with?

 

umm..

3 I think.

1 in the up-pipe and two from the turbo back.

 

When I bought my WRX from dealer and the finance manager was going over the car, I think she said 5 or 7.

Why do I ask? I was talking to friend and told this to him and he found this hard to believe. I wanted to know for my knowledge.

Can anyone from Subaru chime in?

Gdogg?


Thanks

 

Thanks gang

 

It's got a metal substrate cat in the up-pipe. And two in the down-pipe/mid pipe sections. I'm pretty sure the later two are of the conventional material (not metal substrate). However, my car only has two now. Stock up-pipe cat and a hi-flow metal substrate cat in my Cobb down-pipe...boost comes on soooooooo much quicker...(With Stage 2 map of course).

 

3 cats. 1 in the up-pipe. 2 in the downpipe (1 in each portion of it).

 

WRX exhaust diagram, courtesy of Matt Randolph.

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0==WW==0
"…axles of evil…" - george w. bush

 

see this is what i dont get about subaru...they make this badass car with an awesome boxster sound and they resrict the s*** out of it with 3 cats...is it out of necessity to pass emmisions or just cuz they wanna...anyone care to throw out suggestions

 

Without getting into a long off-topic rant about emissions testing, Subaru uses three cats because it was the most cost-effective way to control cold-start emissions on the U.S. WRX. Same reason why our WRXs have tumble generator valves. U.S. emission laws are probably the strictest in the world. The EPA test cycle is much more complicated than your neighborhood smog test station. This is what manufacturers have to submit their vehicles to. It includes a driving test segment and instrumented data logging. That's a political topic more suited to the Car Lounge forum.

--
0==WW==0
"…axles of evil…" - george w. bush

 

good thing they dont do emmisions testing in washington...yeee

 

In addition to what Wingless said, Subaru found it more space/cost efficient to use 3 smaller cats that clean the emmissions in steps rather than 1 large traditional cat that did it all at once.

 

Good info. Thanks for the diagram wingless.